Cisco IAD2431-16FXS Manuel d'utilisateur télécharger pdf (Page 10)

T-1 and Fractional T-1

 Full channelized T-1

– Digital trunk with 24 TDM channels

– Operates at 1.544 Mbps

– 64 kbps channels (bit robbing may reduce to 56 kbps)

– Competes directly with PRI service

– Reduced signaling capability compared with PRI

 Fractional T-1

– Marketed under many names (e.g., flexible T-1)

– Reduced capacity T-1 service (< 24 channels)

– Can be a data or voice service

 Channelized vs. unchannelized

– Individual 64 kbps channels

– One higher speed data stream (maximum 1.544 Mbps)

T-1

FT-1

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Cisco IAD2431-16FXS Manuel d'utilisateur Page 10